Rather than working on the injured muscle directly, they focus on the antagonist muscle for a gentler approach. https://score.ws/%EB%A7%88%EC%82%AC%EC%A7%80-%EC%BD%94%EC%8A%A4-%EC%B6%94%EC%B2%9C-%EC%8A%A4%ED%8A%B8%EB%A0%88%EC%8A%A4-%ED%95%B4%EC%86%8C%EC%99%80-%EA%B1%B4%EA%B0%95%EC%9D%84-%EC%9C%84%ED%95%9C-%EC%99%84%EB%B2%BD/